Cylinder-boring machine



Dec. 9 1,519,415

J. w. MYERS CYLINDER BORING MACHINE Filed June 27, 1921 2 Sheets-Sheet 1 lummlllm 'INVENTOR. Jab? My r5 J. W. MYERS CYLINDER BORING MACHINE 2 Sheets-Sheet 2 Filed June 27, 1921 INVENTOR. Jo'szpli' l f/fly 'z's BY ATTORNEY,

Patentecl Dec. 16, 1924.-

um mn vsnares PATENT orelce.

JOSEPH W. MYERS, 'OFJACKSON, MICHIG AN, ASSIGNOR HINCKLEY-MYERS COM- PANY, OF JACKSON, MICHIGAN, A CORPORATION OF MICHIGAN.

a CYLINDER-BORING MACHIIVE.

Application filed June 27, 1921. Serial No. 480,519.

To all whom it may concern:

Be it known that I, JOSEPH W. MYERS, acitizen' of the United States, residing at Jackson, county of Jackson, State of Michigen, have invented a certain new and useful Improvement .in Cylinder-Boring Machines, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled inthe art to which it pertains to make and use the same,

reference being had to the accompanying drawings, which form a part of this speci-v fication.

My invention relates to cylinder boring machines and a special object of my improvements is to provide an improved apparatus for reboring the cylinders. for automobile engines.

In the accompanying drawings: Figure 1 is a perspective view of an apparatus embodying my invention. i

Fig. 2 is an elevation of a part of the same to an enlarged scale. Fig. 3 is a detailed plan view partly in section on the line IIL-III Fig 2.

Fig. 4 is a detailed elevation partly in section on the line IV-IV Fig. 2.

Fig. 5 is a sectional detail of the lower end i of the boring bar. v

Fig. 6 is a detail section on the line .VI VI Fig.1. v

a is the bed of the machine having trans verse securing slots 64* therein. (4 is the standard rising from. the bed a and af is the overhanging portion of the frame.

I) is the screw threaded boring bar. 12

is a cylindrical rod fitting and adapted toreciprocate vertically in an aperture through and concentric with the boring bar. is provided with a handle 6 at its upper end, fits closely in sleeves in the boring bar as indicated in Fig 5 and its lower end is gdlpted to extend and fit into a sleeve inthe e a. I

c 0 Figs. 2 and 3, are-the two constituent halves of a centering tool adapted to be secured toward the lower end of the bar rocate thereon. Said ring is providedwith a split conical sleeve'g (Fig. 6) with an adj usting nut 3 by which it can be brought into close engagement with the boring bar.

8 is a yoke having two opposite laterally extending arms and a central annular portion which is sleeved over the annular project-ion'f of the ring f and is pivotally setal pivot pins f6. Theyoke e is provided at its center and on each side of the projection f with .a downwardly projecting portion 6 having a curved lower face or rocker engaging against the upper surface of the ring f? where it forms a shoulder adjacent to the projection f. e e are slots formed in the sides and at the ends of the arms e.

' d d are rods provided with heads at their lower ends adapted to engage in the slots (1 and having their upper ends screw-threaded as shown at (1 (P. to engage in the slots 6 with a relative lateral movement. d d are nuts having interior screw threads engaging the screw threads d on the rods at. These nuts are provided with hand wheels or'means by which they may be manipulated to adjust them vertically. The operation of the above described apparatus isas follows:

The casting to is placed upon the bed 0;"

into the sleeve of the bed a. The casting 00, -being adjusted in its position on the bed until the conical tool 0 c accurately engages the walls of the bore of the cylinder. This will bring the cylinder to be bored accurately axially in line with the boring bar. The tool 0 and o is then raised, by means of the rod b and handles 6 out of engagement in the bore of the cylinder and removed from the bar I) by separating the halves c 0 The ring f is then .adjusted in position upon the upper surface of the cylinder block a". The rodsd are. engaged in the slots e e and the nuts (Z (Z are screwed up until the'yoke 6' presses the ring f firmly against the surface of the block 01 thus rigidly clamping the latter upon the bed a in position to be bored. The boring bar I) and the The rods 05 are adapted I having a bed and a' boring cutting tool on the end thereof is then operated in the. usual way to boreout the cylinder.

.g g are brackets'secured to the lower surface of the overhanging portion a of the frame a, a a

When one cylinder has been bored the yoke e is'released by screwing upward on the nuts d d and throwing the rods d out of engagement with the yokee. Said yoke with the attached ring 7 is then raised upward and rotated to engage in the brackets g 9 where it is held out of thew'ay for subsequent use. 1

I -The above construction facilitates the clamping operation in that it is not necessary to screw the'nuts cl and at down abso- "lutely evenly as the yoke may rock about the pivot pin fe and upon the engaging surfaces between said yoke and the collar 7.

The ring f being clamped to the cylinder block and fitted closely to the boring bar as above described supports saidb'ar; and pre vents any vibration thereof.

The yoke and ring f are preferably c'on-.

structed as surrounding the borin bar but the functional feature, of course, is the position of the yoke relative to the bar, that it .is 'in juxta-position and has a relative longitudinal movement relative thereto so as to serve the purpose of the construction. The range of equivalents in the claims includes such equivalent constructions.

Claims:- j,

1. The combination of a boring machine having a bed and a boring bar, a clamping yoke surrounding said bar-and having'laterally extending arms, bolts engaging said bed and engaging said arms toward the ends thereof, and adjustable parts on said bolts causing said yoke to clamp the casting position on the bed, and an annular part surrounding said bar located between saidyoke being pivcasting and said yoke, the oted to said annular part.

. 2. Thecombination of a laterally removed therefrom for centering i the casting, said rod being adapted to bemanipulated from the upper. end thereof to operate said tool. I

3. The combination of 'a boring machine having a bed and a boring bar, a clamping yoke surrounding said bar and having laterally extending arms, bolts engaging said bed and engaging said arms toward the ends thereof, and adjustable parts on said bolts causingsaid yoke to clamp the casting in position on the bed, said boring bar having a' central aperture therethrough, a longitudinally movable rod passing through said aperture, a centering tool adapted to. besecured to the lower end of said rod for centering-the casting, said rod being adapted to belmanipulated from the upper end thereof tooperate said tool, said rod engaging-the bed of the machine at its lower end.

4. Thecombination of a boring tool having a boring bar, a yoke surrounding said bar and adapted'to be oscillated about the same in a. plane at right angles to the axis,

thereof, means engaging said yoke to clamp the cylinder. casting in place, and a bracket,

9 adapted-to receive and hold said yoke in inoperative position when said yoke is moved along said bar and is rotated about the same, substantially as and for the purpose described. I

5. The combination of a boring machine having a bed and a boring bar, a clamping yoke surrounding said bar and having laterally extending arms, bolts engaging said bed and engagin'gssaid arms toward the ends thereof, and adjufstable parts 011 said bolts causing said yoke to clamp the casting in position on the bed, and adjustable means on said chine having a bed and a boring bar of a clamping yoke surrounding .said bar and having laterally extending arms, lateral slots in the ends of. said arms, bolts engaging said bed and engaging in said slots by a lateral movement and adjustable parts on said bolts yoke. for engaging and steadying said I combination with a boring macausin said oke to clam the castin in position on the bed, and an annular part surrounding said bar located between said casting and said yoke, the oted to said annular part. I

In testimony whereof, I, JosErH V. MYERS sign this specification.

JOSEPH W. MYERS.

yoke being piv- 

